Position summary T-Mobile is America’s supercharged Un-carrier, delivering an advanced 4G LTE and transformative nationwide 5G network that will offer reliable connectivity for all. Sr Engineers, Software located in Bellevue, WA will understand system protocols, how systems operate and data flows. Position duties and responsibilities include, but are not limited to: • Design and build systems that allow millions of connected IoT devices to send and receive data securely using cloud services. • Develop and support software that handles large volumes of information being transmitted in real time from remote IoT devices. • Create software solutions to organize, store, and retrieve different types of data effectively for business use. • Build system components that can grow easily as the number of devices or users increases, without slowing down or failing. • Set up automated processes that help deliver software updates and infrastructure changes quickly and reliably. • Monitor the health, speed, and reliability of systems and take action when issues are detected. • Work closely with other teams to understand business needs and turn them into working software solutions. • Provide guidance on how to build and maintain large-scale systems that meet business, technical, and security standards. • Research and apply new tools and techniques that make systems better, faster, and easier to manage. • Write documentation and share knowledge with other engineers to support teamwork and long-term success. • Telecommuting is permitted, but applicant must work from the worksite location at least 3-4 days per week. • No additional national or international travel is anticipated. Skill requirements: • (1) Building scalable applications using .NET Core, ASP.NET Core, and C#, with experience handling structured and unstructured data using PostgreSQL, MongoDB, and Cosmos DB; • (2) Designing and managing cloud-native systems using Microsoft Azure (IoT Hub, Functions, DevOps), with infrastructure automation via Terraform and Helm; • (3) Working with high-volume data pipelines using Apache Kafka, Event Hub and Azure Stream Analytics to support real-time device communication; • (4) Working with system observability through Azure Monitor, Grafana, and Application Insights to maintain reliability, detect bottlenecks, and ensure service continuity across millions of connected devices; and • (5) Optimizing performance and scalability of IoT systems supporting millions of connected devices through distributed design and intelligent resource management using Kubernetes and Redis. Experience and education requirements: PRIMARY REQUIREMENTS: Bachelor’s degree in Computer Engineering, or a related field, or its foreign equivalent, and 5 years of relevant work experience. ALTERNATIVE REQUIREMENTS: Master’s degree in Computer Engineering, or a related field, or its foreign equivalent, and 3 years of relevant work experience. Additional:                                                 • Location: Bellevue, WA • This position is eligible for the employee referral program. How to apply: • Visit https://careers.t-mobile.com/ • Create a candidate profile, and apply to REQ371132. OTHER:  Work hours: 40 hours/week. Washington Pay Range: $206,086.00 to $211,086.00/year. The pay range above is the general base pay range for a successful candidate in the state listed. The successful candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience. At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year.  Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance, while Retail and Business Sales roles are eligible for monthly or quarterly sales incentives. And since we are ALL owners, EVERY employee at T-Mobile is eligible for an Annual Stock Grant. For information about T-Mobile’s amazing benefits, check out   • At least 18 years of age • Legally authorized to work in the United States Travel: Travel Required (Yes/No): No DOT Regulated: DOT Regulated Position (Yes/No): No Safety Sensitive Position (Yes/No): No Candidate’s pay will be based on various factors, such as work location, qualifications, and experience. At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and/or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and/or team performance.  At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part-time employees have access to the same benefits when eligible. We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually - paid parental and family leave, family building benefits, back-up care, enhanced family support, childcare subsidy, tuition assistance, college coaching, short- and long-term disability, voluntary AD&D coverage, voluntary accident coverage, voluntary life insurance, voluntary disability insurance, and voluntary long-term care insurance. We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs! To learn about T-Mobile’s amazing benefits, check out . Never stop growing! As part of the T-Mobile team, you know the Un-carrier doesn’t have a corporate ladder–it’s more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it’s that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you’re living our values while investing in your career growth–and we applaud it. You’re unstoppable!